I hear that it's not good for accuracy to clean a 22 very often. I was wondering if pulling a boresnake after each shooting session would be good enough to clean out the barrel? Or should the old cleaning patch technique be used?
A clean .22 barrel of decent quality, needs a few fouling shots to regain accuracy. Then it maintains its accuracy for several hundred to a thousand rounds (maybe more), depending of course on the condition of your barrel and the ammo you are using.
My take on when to clean? Only one criteria. Clean if and only when your accuracy drops. I've got more than 500 shots of mixed lead and plated Winchester bulk pack through each of my CZ452s and groups have been constant.
The dirt you see when you scope a 22 bore is usually just powder residue. It gets blown out by the next shot and replaced with fresh residue . Decent ammo has bullet lubricant that protects the bore from wear and it takes few shots to deposit a nice layer of lube. Leading is almost non-existent because of the low velocities and efficient modern lubricants.
If you have leading, you will know because then your accuracy will drop. Time to clean.
I think most wear on .22 barrels occur in the first few dozen shots in a "just cleaned" bore. No lubricant barrier yet. This is analogous to cold starting your car engine when the oil has not built up sufficient pressure and the wearing surfaces are basically "dry".
Agree with cleaning techniques in previous posts, ie. one piece rods (there are not joints to mess with rifling), patches only...no brass brushes, bore guide a must.
.22 barrels are not cleaning sensitive per se, it is just that because of the lack of knowledge on proper cleaning technique, most of us do more damage to the bore while cleaning than a blob of lead ahead of hot propellant gases.